Giga 3 vs Kontakt 2: Which do you prefer and why?

I am sure this isn't the first time the subject has been brought up. Which program should I purchase, and why? I have heark Kontakt is more stable, and has fewer set-up problems. Is this true? Will Kontakt be able to run sounds designed for Giga and not loose the perfomance setups? No flaming, please.